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| 31. | Rust is the product of a slow combination of iron with atmospheric oxygen and water vapor. |
| 锈是铁和空气中的氧和水蒸汽缓慢结合的产物。 |
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| 32. | Crown rust is the common name both of a serious leaf-rust disease of oats and of the causal agent. |
| 冠锈病是燕麦的一种严重的叶锈病和病原菌。 |
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| 33. | Please scour rust spots from the knife. |
| 请擦去刀上的锈斑。 |
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| 34. | The metal has corroded because of rust. |
| 该金属已锈蚀. |
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| 35. | Rust was eating away the iron supports. |
| 铁锈腐蚀着铁柱。 |
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| 36. | Idleness is the rust of the mind. |
| 懒惰使脑筋锈烂。 |
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| 37. | Don't let your talents rust. |
| 不要糟蹋你的才华。 |
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| 38. | The certificate indicates that some of the rollers are rust . |
| 商检证书上表明有些滚筒生锈了。 |
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| 39. | The shuttle plate and parts in this area at the front of the machine should be well dried and a little oil applied to prevent any rust. |
| 机器前面的梭形板及位于该处的各个零件应仔细擦干并加少量的油，以防生锈。 |
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| 40. | The application of this paint makes the metal proof against rust. |
| 涂这种油漆能防止金属生锈。 |
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